
    <!DOCTYPE html>
    <html lang="zh-CN">
    <head>
      <meta charset="UTF-8">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <title>3、自动化配置的条件化 - 交互式测验</title>
      <style>
        @import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&display=swap');
        
        body {
          font-family: 'Noto Sans SC', sans-serif;
          background-color: #f4f7f9;
          color: #333;
          display: flex;
          justify-content: center;
          align-items: center;
          min-height: 100vh;
          margin: 0;
          padding: 20px;
          box-sizing: border-box;
        }
        
        .main-wrapper {
            position: relative;
            width: 100%;
            max-width: 900px; /* Wider to accommodate buttons */
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .quiz-container {
          background-color: #ffffff;
          border-radius: 16px;
          box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
          width: 100%;
          max-width: 700px;
          overflow: hidden;
          z-index: 10;
        }

        .quiz-header {
          background-color: #4a90e2;
          color: white;
          padding: 20px 30px;
          text-align: center;
        }

        .quiz-header h1 {
          margin: 0;
          font-size: 24px;
          font-weight: 700;
        }
        
        .quiz-header p {
            margin: 5px 0 0;
            font-size: 14px;
            opacity: 0.9;
        }

        .quiz-body {
          padding: 30px;
        }

        .progress-bar {
            display: none; /* 隐藏进度条 */
            width: 100%;
            background-color: #e0e0e0;
            border-radius: 5px;
            height: 10px;
            margin-bottom: 20px;
        }

        #progress-indicator {
            height: 100%;
            width: 0%;
            background-color: #4caf50;
            border-radius: 5px;
            transition: width 0.3s ease;
        }

        #question-container {
          margin-bottom: 20px;
        }

        #question-text {
          font-size: 18px;
          font-weight: 500;
          line-height: 1.6;
          margin-bottom: 25px;
        }

        .options-list {
          list-style: none;
          padding: 0;
          margin: 0;
        }

        .option-item {
          background-color: #f8f9fa;
          border: 1px solid #dee2e6;
          border-radius: 8px;
          padding: 15px;
          margin-bottom: 12px;
          cursor: pointer;
          transition: background-color 0.2s ease, border-color 0.2s ease;
        }

        .option-item:hover {
          background-color: #e9ecef;
        }
        
        .option-item.selected {
            background-color: #d1e7fd;
            border-color: #4a90e2;
        }

        .quiz-footer {
          padding: 20px 30px;
          display: flex;
          justify-content: space-between; /* 将按钮分布在两侧 */
          align-items: center;
          min-height: 65px; /* Reserve space */
        }

        .nav-btn {
          background-color: #4a90e2;
          color: white;
          border: none;
          border-radius: 8px;
          padding: 10px 20px;
          font-size: 16px;
          font-weight: 500;
          cursor: pointer;
          transition: background-color 0.2s ease, transform 0.2s ease;
          box-shadow: 0 4px 12px rgba(0,0,0,0.15);
        }
        
        #next-btn {
            background-color: #28a745;
        }

        .nav-btn:hover {
          background-color: #357abd;
          transform: scale(1.05);
        }
        
        .nav-btn:disabled {
            background-color: #a0c3e8;
            cursor: not-allowed;
            opacity: 0.7;
        }

        #result-container {
            border-top: 1px solid #eee;
        }
        
        .result-box {
            border-radius: 8px;
            padding: 20px;
            margin-top: 20px;
        }
        
        .result-box.correct {
            background-color: #d4edda;
            border: 1px solid #c3e6cb;
            color: #155724;
        }

        .result-box.incorrect {
            background-color: #f8d7da;
            border: 1px solid #f5c6cb;
            color: #721c24;
        }
        
        .result-box h3 {
            margin-top: 0;
        }

        .explanation-text {
            margin-top: 15px;
            line-height: 1.7;
        }
        
        .source-text {
            font-style: italic;
            font-size: 14px;
            margin-top: 15px;
            color: #555;
        }

        
        .final-score-container {
            padding: 40px;
            text-align: center;
        }
        .final-score-container h2 {
            margin-top: 0;
            margin-bottom: 30px;
        }
        .score-summary {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }
        .score-card {
            background-color: #f8f9fa;
            border-radius: 12px;
            padding: 20px;
            width: 180px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            border: 1px solid #e9ecef;
        }
        .score-card h3 {
            margin: 0 0 10px;
            font-size: 16px;
            font-weight: 500;
            color: #555;
        }
        .score-card p {
            margin: 0;
            font-size: 28px;
            font-weight: 700;
            color: #333;
        }
        .score-details table {
            width: 100%;
            font-size: 16px;
        }
        .score-details td {
            padding: 4px 0;
        }
        .score-details td:last-child {
            text-align: right;
            font-weight: 700;
        }
        .report-actions button {
            background-color: #fff;
            border: 1px solid #ccc;
            border-radius: 8px;
            padding: 12px 25px;
            font-size: 16px;
            cursor: pointer;
            margin: 0 10px;
            transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
        }
        .report-actions button:hover {
            background-color: #f1f1f1;
            border-color: #bbb;
            transform: translateY(-2px);
        }
        .report-actions button.primary {
            background-color: #28a745;
            color: white;
            border-color: #28a745;
        }
        .report-actions button.primary:hover {
            background-color: #218838;
        }
        
        .hint-container {
            background-color: #e0f7fa;
            border: 1px solid #b2ebf2;
            border-radius: 8px;
            padding: 15px;
            margin-top: 20px;
            color: #006064;
            font-size: 15px;
            line-height: 1.6;
            display: none; /* 默认隐藏 */
        }
      </style>
    </head>
    <body>
      <div class="main-wrapper">
          <div class="quiz-container">
            <div class="quiz-header">
              <h1>3、自动化配置的条件化 - 交互式测验</h1>
              <p>检验你对文档内容的理解程度</p>
            </div>
            <div id="quiz-content">
                <div class="quiz-body">
                    <div class="progress-bar">
                        <div id="progress-indicator"></div>
                    </div>
                    <div id="question-container">
                      <p id="question-text"></p>
                      <ul class="options-list" id="options-list"></ul>
                    </div>
                    <div id="result-container"></div>
                    <div id="hint-container" class="hint-container"></div>
                </div>
                <div class="quiz-footer" id="quiz-footer">
                  <button id="prev-btn" class="nav-btn">上一题</button>
                  <button id="hint-btn" class="nav-btn" style="background-color: #ffc107; color: #333; box-shadow: 0 4px 12px rgba(255,193,7,0.3);">提示</button>
                  <button id="next-btn" class="nav-btn">下一题</button>
                </div>
            </div>
          </div>
      </div>

      <script>
        const quizData = [
  {
    "question": "在Spring Boot的自动化配置中，哪个注解是所有条件化配置的核心基础，它允许通过一个实现了特定接口的类来判断是否创建某个Bean？",
    "options": [
      "@EnableAutoConfiguration",
      "@Conditional",
      "@Configuration",
      "@Component"
    ],
    "correctAnswerIndex": 1,
    "explanation": "根据文档，`@Conditional` 是 Spring Framework 提供的核心注解，它是一切条件化配置的基石。它通过其 `value` 属性接收一个或多个实现了 `Condition` 接口的类，Spring 容器会根据这些 `Condition` 类的判断结果（true或false）来决定是否创建和注册被该注解标记的Bean。",
    "source": "文档中「1. @Conditional 注解及其实现机制」部分",
    "hint": "文档开头就提到了一个核心注解，它是Spring框架提供的，用于根据一定条件来判断是否创建某个Bean。"
  },
  {
    "question": "实现Spring条件化配置逻辑的 `Condition` 接口，其核心方法是什么？该方法通过返回什么值来决定是否注册相关Bean？",
    "options": [
      "方法是 `check()`，返回 `true` 时注册Bean。",
      "方法是 `matches()`，返回 `false` 时注册Bean。",
      "方法是 `evaluate()`，返回 `ConditionOutcome` 对象来决定。",
      "方法是 `matches()`，返回 `true` 时注册Bean。"
    ],
    "correctAnswerIndex": 3,
    "explanation": "`Condition` 接口只定义了一个核心方法 `matches(ConditionContext context, AnnotatedTypeMetadata metadata)`。这个方法的返回值是布尔类型，当实现类重写此方法并返回 `true` 时，表示条件满足，Spring容器就会注册相关的Bean；反之，如果返回 `false`，则忽略该Bean。",
    "source": "文档中「2. Condition 接口与条件判断」部分",
    "hint": "这个接口定义了一个方法，用于判断某个条件是否满足。方法的名称与“匹配”相关。"
  },
  {
    "question": "在开发一个starter时，你希望某个自动配置类（AutoConfiguration）仅在项目的类路径（classpath）下存在 `com.example.SomeDriver` 这个类时才生效。你应该使用哪个注解来实现这个需求？",
    "options": [
      "@ConditionalOnProperty(name = \"com.example.SomeDriver\")",
      "@ConditionalOnMissingBean(SomeDriver.class)",
      "@ConditionalOnClass(name = \"com.example.SomeDriver\")"
    ],
    "correctAnswerIndex": 2,
    "explanation": "`@ConditionalOnClass` 注解专门用于检查类路径中是否存在指定的类。当开发者在项目中引入了包含 `com.example.SomeDriver` 类的依赖时，该注解的条件就会满足，从而激活相关的自动配置。这是实现与特定依赖集成的标准方式。",
    "source": "文档中「3. 常见条件化注解」部分的「@ConditionalOnClass」",
    "hint": "文档介绍了一个常用的条件化注解，它的功能是“用于根据类路径中是否存在某些类来决定是否加载某个配置”。"
  },
  {
    "question": "Spring Boot的自动配置经常提供默认的Bean实现（例如一个默认的DataSource），但同时也允许开发者自定义并覆盖它。这种“如果不存在才创建”的逻辑，主要是通过哪个注解实现的？",
    "options": [
      "@ConditionalOnBean",
      "@Primary",
      "@ConditionalOnMissingBean"
    ],
    "correctAnswerIndex": 2,
    "explanation": "`@ConditionalOnMissingBean` 是实现“约定优于配置”和提供可覆盖默认值的关键。它会检查Spring应用上下文中是否已经存在指定类型的Bean。如果不存在，则创建并注册被此注解标记的Bean；如果用户已经自定义了同类型的Bean，则自动配置的默认Bean不会被创建。",
    "source": "文档中「3. 常见条件化注解」部分的「@ConditionalOnMissingBean」",
    "hint": "思考一下，为了提供一个可被覆盖的默认Bean，自动配置需要检查的条件是“容器中是否缺失某个Bean”。"
  },
  {
    "question": "如果你希望某个Bean的创建与否由 `application.properties` 文件中的一个开关属性来控制，例如只有当 `logging.feature.enabled=true` 时才创建该Bean，最适合使用哪个注解？",
    "options": [
      "@ConditionalOnProperty(name = \"logging.feature.enabled\", havingValue = \"true\")",
      "@Value(\"${logging.feature.enabled}\")",
      "@Profile(\"enabled\")",
      "@ConditionalOnExpression(\"'${logging.feature.enabled}' == 'true'\")"
    ],
    "correctAnswerIndex": 0,
    "explanation": "`@ConditionalOnProperty` 是专门用于根据配置文件中的属性值来决定是否加载配置的注解。通过 `name` 属性指定要检查的属性名，通过 `havingValue` 属性指定期望的值。只有当配置文件中的属性值与 `havingValue` 匹配时，条件才成立。",
    "source": "文档中「3. 常见条件化注解」部分的「@ConditionalOnProperty」",
    "hint": "文档中描述了一个注解，它可以“根据配置文件中的某个属性值来决定是否加载配置”。"
  },
  {
    "question": "Spring Boot的整个自动配置机制是由哪个核心注解启动的？它内部通过导入哪个关键类来扫描和加载所有符合条件的自动配置类？",
    "options": [
      "@ComponentScan，它通过 `AutoConfigurationPackages` 来加载。",
      "@EnableAutoConfiguration，它通过 `AutoConfigurationImportSelector` 来加载。",
      "@SpringBootApplication，它通过 `ConditionEvaluator` 来加载。",
      "@Import，它通过 `ConfigurationClassParser` 来加载。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "自动配置的入口点是 `@EnableAutoConfiguration` 注解（它通常被包含在 `@SpringBootApplication` 中）。这个注解通过 `@Import(AutoConfigurationImportSelector.class)` 语句，导入了 `AutoConfigurationImportSelector`。这个类负责从 `spring.factories`（或更高版本的 `spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports`）文件中加载所有候选的自动配置类，并结合条件化注解进行筛选，最终决定哪些配置需要被激活。",
    "source": "文档中「4. 自动配置的工作原理」部分",
    "hint": "自动配置的“开关”注解，其内部通过一个实现了 `ImportSelector` 接口的类来完成复杂的工作。"
  },
  {
    "question": "在`OnClassCondition`的源码实现中，它是如何判断一个类是否存在的？",
    "options": [
      "通过扫描文件系统中的 `.class` 文件。",
      "通过 `context.getBeanDefinitionRegistry().containsBeanDefinition()` 方法检查。",
      "通过 `Class.forName(className, false, classLoader)` 尝试加载类，并捕获 `ClassNotFoundException` 异常。",
      "通过读取 `spring.factories` 文件中的类名列表。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "文档中提供的 `OnClassCondition` 源码片段清晰地展示了其工作原理。它首先从注解元数据中获取需要检查的类名数组，然后遍历这些类名，并使用 `Class.forName()` 方法和当前上下文的 `ClassLoader` 尝试加载它们。如果任何一个类加载失败并抛出 `ClassNotFoundException`，`matches` 方法就会立即返回 `false`。只有所有类都能成功加载，才会返回 `true`。",
    "source": "文档中「2. Condition 接口与条件判断」部分的「OnClassCondition 源码分析」",
    "hint": "查看 `OnClassCondition` 的 `matches` 方法源码，关注其是如何处理异常的。"
  }
];
        console.log("Quiz Data:", JSON.parse(JSON.stringify(quizData))); // 添加这行用于调试，以可展开的JSON格式输出
        
        let currentQuestionIndex = 0;
        let score = 0;
        // 存储每个问题的回答状态
        const userAnswers = new Array(quizData.length).fill(null); 

        const questionTextEl = document.getElementById('question-text');
        const optionsListEl = document.getElementById('options-list');
        const resultContainerEl = document.getElementById('result-container');
        const quizContentEl = document.getElementById('quiz-content');
        const progressIndicatorEl = document.getElementById('progress-indicator');
        const prevBtn = document.getElementById('prev-btn');
        const nextBtn = document.getElementById('next-btn');
        const hintBtn = document.getElementById('hint-btn');
        const hintContainerEl = document.getElementById('hint-container');

        function loadQuestion() {
          resultContainerEl.innerHTML = '';
          optionsListEl.innerHTML = '';
          hintContainerEl.style.display = 'none'; // 隐藏提示
          
          if (currentQuestionIndex >= quizData.length) {
            showFinalScore();
            return;
          }

          updateProgress();

          const currentQuestion = quizData[currentQuestionIndex];
          questionTextEl.textContent = `(${currentQuestionIndex + 1}/${quizData.length}) ${currentQuestion.question}`;
          
          currentQuestion.options.forEach((optionText, index) => {
            const li = document.createElement('li');
            li.className = 'option-item';
            li.textContent = optionText;
            li.dataset.index = index; // Store index in a data attribute
            // 如果这道题已经回答过，恢复状态
            if (userAnswers[currentQuestionIndex] !== null) {
                if (index === userAnswers[currentQuestionIndex]) {
                    li.classList.add('selected');
                }
            }
            optionsListEl.appendChild(li);
          });

          // 如果已经回答过，直接显示结果
          if (userAnswers[currentQuestionIndex] !== null) {
              const isCorrect = userAnswers[currentQuestionIndex] === currentQuestion.correctAnswerIndex;
              showResult(isCorrect, currentQuestion);
          }
          
          updateNavigationButtons();
          updateProgress();
        }

        function selectOption(optionIndex) {
            userAnswers[currentQuestionIndex] = optionIndex;
            const currentQuestion = quizData[currentQuestionIndex];
            const isCorrect = optionIndex === currentQuestion.correctAnswerIndex;

            // 重新计算分数
            score = userAnswers.reduce((acc, answer, index) => {
                return answer === quizData[index].correctAnswerIndex ? acc + 1 : acc;
            }, 0);

            showResult(isCorrect, currentQuestion);
            updateNavigationButtons();
        }
        
        function updateProgress() {
            const answeredQuestions = userAnswers.filter(answer => answer !== null).length;
            const progressPercentage = (answeredQuestions / quizData.length) * 100;
            progressIndicatorEl.style.width = `${progressPercentage}%`;
        }
        
        function updateNavigationButtons() {
            prevBtn.style.display = 'block';
            nextBtn.style.display = 'block';
            hintBtn.style.display = 'block'; // 显示提示按钮

            prevBtn.disabled = currentQuestionIndex === 0;
            nextBtn.disabled = false; // 最后一题时，下一题按钮不禁用，而是用于显示报告
            nextBtn.textContent = (currentQuestionIndex === quizData.length - 1) ? '查看报告' : '下一题';
            
            // 如果当前问题没有提示，则禁用提示按钮并隐藏提示内容
            if (!quizData[currentQuestionIndex].hint) {
                hintBtn.disabled = true;
                hintContainerEl.style.display = 'none';
                hintContainerEl.textContent = ''; // 清除旧的提示内容
            } else {
                hintBtn.disabled = false;
            }
        }

        function showResult(isCorrect, questionData) {
            resultContainerEl.innerHTML = ''; // 清空之前的结果
            const resultBox = document.createElement('div');
            resultBox.className = `result-box ${isCorrect ? 'correct' : 'incorrect'}`;
            
            let html = `<h3>${isCorrect ? '回答正确！' : '回答错误'}</h3>`;
            if (!isCorrect) {
                html += `<p><strong>正确答案是：</strong> ${questionData.options[questionData.correctAnswerIndex]}</p>`;
            }
            html += `<div class="explanation-text">${questionData.explanation}</div>`;
            html += `<div class="source-text">来源: ${questionData.source}</div>`;
            
            resultBox.innerHTML = html;
            resultContainerEl.appendChild(resultBox);

            // 禁用所有选项的点击事件，并高亮正确/错误答案
            Array.from(optionsListEl.children).forEach((child, index) => {
                child.style.pointerEvents = 'none';
                // 高亮正确答案
                if (index === questionData.correctAnswerIndex) {
                    child.classList.add('correct'); // 需要添加CSS样式
                    child.style.backgroundColor = '#d4edda';
                    child.style.borderColor = '#c3e6cb';
                }
                // 如果选错了，高亮错误选项
                if (!isCorrect && index === userAnswers[currentQuestionIndex]) {
                    child.classList.add('incorrect'); // 需要添加CSS样式
                    child.style.backgroundColor = '#f8d7da';
                    child.style.borderColor = '#f5c6cb';
                }
            });
        }

        function goToNextQuestion() {
            if (currentQuestionIndex < quizData.length - 1) {
                currentQuestionIndex++;
                loadQuestion();
            } else {
                showFinalScore();
            }
        }

        function goToPreviousQuestion() {
            if (currentQuestionIndex > 0) {
                currentQuestionIndex--;
                loadQuestion();
            }
        }
        
        function showHint() {
            const currentQuestion = quizData[currentQuestionIndex];
            if (currentQuestion.hint) {
                hintContainerEl.textContent = currentQuestion.hint;
                hintContainerEl.style.display = 'block';
            } else {
                hintContainerEl.style.display = 'none';
            }
        }

        function showFinalScore() {
            document.querySelector('.quiz-body').style.display = 'none';
            document.getElementById('quiz-footer').style.display = 'none';

            const correctCount = score;
            const totalQuestions = quizData.length;
            const answeredCount = userAnswers.filter(a => a !== null).length;
            const wrongCount = answeredCount - correctCount;
            const skippedCount = totalQuestions - answeredCount;
            const accuracy = totalQuestions > 0 ? Math.round((correctCount / totalQuestions) * 100) : 0;
            const errorRate = totalQuestions > 0 ? Math.round((wrongCount / totalQuestions) * 100) : 0;

            const finalScoreHtml =
                '<div class="final-score-container">' +
                '<h2>答题报告</h2>' +
                '<div class="score-summary">' +
                '<div class="score-card">' +
                '<h3>得分</h3>' +
                '<p>' + correctCount + ' / ' + totalQuestions + '</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>正确率</h3>' +
                '<p>' + accuracy + '%</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>错误率</h3>' +
                '<p>' + errorRate + '%</p>' +
                '</div>' +
                '<div class="score-card score-details">' +
                '<table>' +
                '<tr><td>正确</td><td>' + correctCount + '</td></tr>' +
                '<tr><td>错误</td><td>' + wrongCount + '</td></tr>' +
                '<tr><td>未答</td><td>' + skippedCount + '</td></tr>' +
                '</table>' +
                '</div>' +
                '</div>' +
                '<div class="report-actions">' +
                '<button id="review-btn">回顾测验</button>' +
                '<button class="primary" onclick="location.reload()">再试一次</button>' +
                '</div>' +
                '</div>';

            let reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }
            quizContentEl.insertAdjacentHTML('beforeend', finalScoreHtml);
            document.getElementById('review-btn').addEventListener('click', reviewQuiz);
        }

        function reviewQuiz() {
            const reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }

            document.querySelector('.quiz-body').style.display = 'block';
            document.getElementById('quiz-footer').style.display = 'flex';
            
            currentQuestionIndex = 0;
            loadQuestion();
            updateNavigationButtons(); // Ensure nav buttons are correctly displayed
        }

        // Event Delegation for options
        optionsListEl.addEventListener('click', (event) => {
            if (event.target && event.target.matches('li.option-item')) {
                // Check if the question has already been answered
                if (userAnswers[currentQuestionIndex] === null) {
                    const selectedIndex = parseInt(event.target.dataset.index, 10);
                    selectOption(selectedIndex);
                }
            }
        });

        prevBtn.addEventListener('click', goToPreviousQuestion);
        nextBtn.addEventListener('click', goToNextQuestion);
        hintBtn.addEventListener('click', showHint);
        
        // 初始加载
        loadQuestion();
      </script>
    </body>
    </html>
  